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<pre><code><span id="1" class="l"><a class="l" href="#1">  1: </a><span class="xlang">&lt;?php</span>  <span class="php-keyword1">if</span> ( ! <span class="php-keyword2">defined</span>(<span class="php-quote">'BASEPATH'</span>)) <span class="php-keyword1">exit</span>(<span class="php-quote">'No direct script access allowed'</span>);
</span><span id="2" class="l"><a class="l" href="#2">  2: </a><span class="php-comment">/**
</span></span><span id="3" class="l"><a class="l" href="#3">  3: </a><span class="php-comment"> * CodeIgniter
</span></span><span id="4" class="l"><a class="l" href="#4">  4: </a><span class="php-comment"> *
</span></span><span id="5" class="l"><a class="l" href="#5">  5: </a><span class="php-comment"> * An open source application development framework for PHP 5.1.6 or newer
</span></span><span id="6" class="l"><a class="l" href="#6">  6: </a><span class="php-comment"> *
</span></span><span id="7" class="l"><a class="l" href="#7">  7: </a><span class="php-comment"> * @package     CodeIgniter
</span></span><span id="8" class="l"><a class="l" href="#8">  8: </a><span class="php-comment"> * @author      ExpressionEngine Dev Team
</span></span><span id="9" class="l"><a class="l" href="#9">  9: </a><span class="php-comment"> * @copyright   Copyright (c) 2008 - 2011, EllisLab, Inc.
</span></span><span id="10" class="l"><a class="l" href="#10"> 10: </a><span class="php-comment"> * @license     http://codeigniter.com/user_guide/license.html
</span></span><span id="11" class="l"><a class="l" href="#11"> 11: </a><span class="php-comment"> * @link        http://codeigniter.com
</span></span><span id="12" class="l"><a class="l" href="#12"> 12: </a><span class="php-comment"> * @since       Version 1.0
</span></span><span id="13" class="l"><a class="l" href="#13"> 13: </a><span class="php-comment"> * @filesource
</span></span><span id="14" class="l"><a class="l" href="#14"> 14: </a><span class="php-comment"> */</span>
</span><span id="15" class="l"><a class="l" href="#15"> 15: </a>
</span><span id="16" class="l"><a class="l" href="#16"> 16: </a><span class="php-comment">// ------------------------------------------------------------------------</span>
</span><span id="17" class="l"><a class="l" href="#17"> 17: </a>
</span><span id="18" class="l"><a class="l" href="#18"> 18: </a><span class="php-comment">/**
</span></span><span id="19" class="l"><a class="l" href="#19"> 19: </a><span class="php-comment"> * CodeIgniter Security Helpers
</span></span><span id="20" class="l"><a class="l" href="#20"> 20: </a><span class="php-comment"> *
</span></span><span id="21" class="l"><a class="l" href="#21"> 21: </a><span class="php-comment"> * @package     CodeIgniter
</span></span><span id="22" class="l"><a class="l" href="#22"> 22: </a><span class="php-comment"> * @subpackage  Helpers
</span></span><span id="23" class="l"><a class="l" href="#23"> 23: </a><span class="php-comment"> * @category    Helpers
</span></span><span id="24" class="l"><a class="l" href="#24"> 24: </a><span class="php-comment"> * @author      ExpressionEngine Dev Team
</span></span><span id="25" class="l"><a class="l" href="#25"> 25: </a><span class="php-comment"> * @link        http://codeigniter.com/user_guide/helpers/security_helper.html
</span></span><span id="26" class="l"><a class="l" href="#26"> 26: </a><span class="php-comment"> */</span>
</span><span id="27" class="l"><a class="l" href="#27"> 27: </a>
</span><span id="28" class="l"><a class="l" href="#28"> 28: </a><span class="php-comment">// ------------------------------------------------------------------------</span>
</span><span id="29" class="l"><a class="l" href="#29"> 29: </a>
</span><span id="30" class="l"><a class="l" href="#30"> 30: </a><span class="php-comment">/**
</span></span><span id="31" class="l"><a class="l" href="#31"> 31: </a><span class="php-comment"> * XSS Filtering
</span></span><span id="32" class="l"><a class="l" href="#32"> 32: </a><span class="php-comment"> *
</span></span><span id="33" class="l"><a class="l" href="#33"> 33: </a><span class="php-comment"> * @access  public
</span></span><span id="34" class="l"><a class="l" href="#34"> 34: </a><span class="php-comment"> * @param   string
</span></span><span id="35" class="l"><a class="l" href="#35"> 35: </a><span class="php-comment"> * @param   bool    whether or not the content is an image file
</span></span><span id="36" class="l"><a class="l" href="#36"> 36: </a><span class="php-comment"> * @return  string
</span></span><span id="37" class="l"><a class="l" href="#37"> 37: </a><span class="php-comment"> */</span>
</span><span id="38" class="l"><a class="l" href="#38"> 38: </a><span class="php-keyword1">if</span> ( ! <span class="php-keyword2">function_exists</span>(<span class="php-quote">'xss_clean'</span>))
</span><span id="39" class="l"><a class="l" href="#39"> 39: </a>{
</span><span id="40" class="l"><a class="l" href="#40"> 40: </a>    <span class="php-keyword1">function</span> <a id="_xss_clean" href="#_xss_clean">xss_clean</a>(<span class="php-var">$str</span>, <span class="php-var">$is_image</span> = <span class="php-keyword1">FALSE</span>)
</span><span id="41" class="l"><a class="l" href="#41"> 41: </a>    {
</span><span id="42" class="l"><a class="l" href="#42"> 42: </a>        <span class="php-var">$CI</span> =&amp; get_instance();
</span><span id="43" class="l"><a class="l" href="#43"> 43: </a>        <span class="php-keyword1">return</span> <span class="php-var">$CI</span>-&gt;security-&gt;xss_clean(<span class="php-var">$str</span>, <span class="php-var">$is_image</span>);
</span><span id="44" class="l"><a class="l" href="#44"> 44: </a>    }
</span><span id="45" class="l"><a class="l" href="#45"> 45: </a>}
</span><span id="46" class="l"><a class="l" href="#46"> 46: </a>
</span><span id="47" class="l"><a class="l" href="#47"> 47: </a><span class="php-comment">// ------------------------------------------------------------------------</span>
</span><span id="48" class="l"><a class="l" href="#48"> 48: </a>
</span><span id="49" class="l"><a class="l" href="#49"> 49: </a><span class="php-comment">/**
</span></span><span id="50" class="l"><a class="l" href="#50"> 50: </a><span class="php-comment"> * Sanitize Filename
</span></span><span id="51" class="l"><a class="l" href="#51"> 51: </a><span class="php-comment"> *
</span></span><span id="52" class="l"><a class="l" href="#52"> 52: </a><span class="php-comment"> * @access  public
</span></span><span id="53" class="l"><a class="l" href="#53"> 53: </a><span class="php-comment"> * @param   string
</span></span><span id="54" class="l"><a class="l" href="#54"> 54: </a><span class="php-comment"> * @return  string
</span></span><span id="55" class="l"><a class="l" href="#55"> 55: </a><span class="php-comment"> */</span>
</span><span id="56" class="l"><a class="l" href="#56"> 56: </a><span class="php-keyword1">if</span> ( ! <span class="php-keyword2">function_exists</span>(<span class="php-quote">'sanitize_filename'</span>))
</span><span id="57" class="l"><a class="l" href="#57"> 57: </a>{
</span><span id="58" class="l"><a class="l" href="#58"> 58: </a>    <span class="php-keyword1">function</span> <a id="_sanitize_filename" href="#_sanitize_filename">sanitize_filename</a>(<span class="php-var">$filename</span>)
</span><span id="59" class="l"><a class="l" href="#59"> 59: </a>    {
</span><span id="60" class="l"><a class="l" href="#60"> 60: </a>        <span class="php-var">$CI</span> =&amp; get_instance();
</span><span id="61" class="l"><a class="l" href="#61"> 61: </a>        <span class="php-keyword1">return</span> <span class="php-var">$CI</span>-&gt;security-&gt;sanitize_filename(<span class="php-var">$filename</span>);
</span><span id="62" class="l"><a class="l" href="#62"> 62: </a>    }
</span><span id="63" class="l"><a class="l" href="#63"> 63: </a>}
</span><span id="64" class="l"><a class="l" href="#64"> 64: </a>
</span><span id="65" class="l"><a class="l" href="#65"> 65: </a><span class="php-comment">// --------------------------------------------------------------------</span>
</span><span id="66" class="l"><a class="l" href="#66"> 66: </a>
</span><span id="67" class="l"><a class="l" href="#67"> 67: </a><span class="php-comment">/**
</span></span><span id="68" class="l"><a class="l" href="#68"> 68: </a><span class="php-comment"> * Hash encode a string
</span></span><span id="69" class="l"><a class="l" href="#69"> 69: </a><span class="php-comment"> *
</span></span><span id="70" class="l"><a class="l" href="#70"> 70: </a><span class="php-comment"> * @access  public
</span></span><span id="71" class="l"><a class="l" href="#71"> 71: </a><span class="php-comment"> * @param   string
</span></span><span id="72" class="l"><a class="l" href="#72"> 72: </a><span class="php-comment"> * @return  string
</span></span><span id="73" class="l"><a class="l" href="#73"> 73: </a><span class="php-comment"> */</span>
</span><span id="74" class="l"><a class="l" href="#74"> 74: </a><span class="php-keyword1">if</span> ( ! <span class="php-keyword2">function_exists</span>(<span class="php-quote">'do_hash'</span>))
</span><span id="75" class="l"><a class="l" href="#75"> 75: </a>{
</span><span id="76" class="l"><a class="l" href="#76"> 76: </a>    <span class="php-keyword1">function</span> <a id="_do_hash" href="#_do_hash">do_hash</a>(<span class="php-var">$str</span>, <span class="php-var">$type</span> = <span class="php-quote">'sha1'</span>)
</span><span id="77" class="l"><a class="l" href="#77"> 77: </a>    {
</span><span id="78" class="l"><a class="l" href="#78"> 78: </a>        <span class="php-keyword1">if</span> (<span class="php-var">$type</span> == <span class="php-quote">'sha1'</span>)
</span><span id="79" class="l"><a class="l" href="#79"> 79: </a>        {
</span><span id="80" class="l"><a class="l" href="#80"> 80: </a>            <span class="php-keyword1">return</span> <span class="php-keyword2">sha1</span>(<span class="php-var">$str</span>);
</span><span id="81" class="l"><a class="l" href="#81"> 81: </a>        }
</span><span id="82" class="l"><a class="l" href="#82"> 82: </a>        <span class="php-keyword1">else</span>
</span><span id="83" class="l"><a class="l" href="#83"> 83: </a>        {
</span><span id="84" class="l"><a class="l" href="#84"> 84: </a>            <span class="php-keyword1">return</span> <span class="php-keyword2">md5</span>(<span class="php-var">$str</span>);
</span><span id="85" class="l"><a class="l" href="#85"> 85: </a>        }
</span><span id="86" class="l"><a class="l" href="#86"> 86: </a>    }
</span><span id="87" class="l"><a class="l" href="#87"> 87: </a>}
</span><span id="88" class="l"><a class="l" href="#88"> 88: </a>
</span><span id="89" class="l"><a class="l" href="#89"> 89: </a><span class="php-comment">// ------------------------------------------------------------------------</span>
</span><span id="90" class="l"><a class="l" href="#90"> 90: </a>
</span><span id="91" class="l"><a class="l" href="#91"> 91: </a><span class="php-comment">/**
</span></span><span id="92" class="l"><a class="l" href="#92"> 92: </a><span class="php-comment"> * Strip Image Tags
</span></span><span id="93" class="l"><a class="l" href="#93"> 93: </a><span class="php-comment"> *
</span></span><span id="94" class="l"><a class="l" href="#94"> 94: </a><span class="php-comment"> * @access  public
</span></span><span id="95" class="l"><a class="l" href="#95"> 95: </a><span class="php-comment"> * @param   string
</span></span><span id="96" class="l"><a class="l" href="#96"> 96: </a><span class="php-comment"> * @return  string
</span></span><span id="97" class="l"><a class="l" href="#97"> 97: </a><span class="php-comment"> */</span>
</span><span id="98" class="l"><a class="l" href="#98"> 98: </a><span class="php-keyword1">if</span> ( ! <span class="php-keyword2">function_exists</span>(<span class="php-quote">'strip_image_tags'</span>))
</span><span id="99" class="l"><a class="l" href="#99"> 99: </a>{
</span><span id="100" class="l"><a class="l" href="#100">100: </a>    <span class="php-keyword1">function</span> <a id="_strip_image_tags" href="#_strip_image_tags">strip_image_tags</a>(<span class="php-var">$str</span>)
</span><span id="101" class="l"><a class="l" href="#101">101: </a>    {
</span><span id="102" class="l"><a class="l" href="#102">102: </a>        <span class="php-var">$str</span> = <span class="php-keyword2">preg_replace</span>(<span class="php-quote">&quot;#&lt;img\s+.*?src\s*=\s*[\&quot;'](.+?)[\&quot;'].*?\&gt;#&quot;</span>, <span class="php-quote">&quot;\\1&quot;</span>, <span class="php-var">$str</span>);
</span><span id="103" class="l"><a class="l" href="#103">103: </a>        <span class="php-var">$str</span> = <span class="php-keyword2">preg_replace</span>(<span class="php-quote">&quot;#&lt;img\s+.*?src\s*=\s*(.+?).*?\&gt;#&quot;</span>, <span class="php-quote">&quot;\\1&quot;</span>, <span class="php-var">$str</span>);
</span><span id="104" class="l"><a class="l" href="#104">104: </a>
</span><span id="105" class="l"><a class="l" href="#105">105: </a>        <span class="php-keyword1">return</span> <span class="php-var">$str</span>;
</span><span id="106" class="l"><a class="l" href="#106">106: </a>    }
</span><span id="107" class="l"><a class="l" href="#107">107: </a>}
</span><span id="108" class="l"><a class="l" href="#108">108: </a>
</span><span id="109" class="l"><a class="l" href="#109">109: </a><span class="php-comment">// ------------------------------------------------------------------------</span>
</span><span id="110" class="l"><a class="l" href="#110">110: </a>
</span><span id="111" class="l"><a class="l" href="#111">111: </a><span class="php-comment">/**
</span></span><span id="112" class="l"><a class="l" href="#112">112: </a><span class="php-comment"> * Convert PHP tags to entities
</span></span><span id="113" class="l"><a class="l" href="#113">113: </a><span class="php-comment"> *
</span></span><span id="114" class="l"><a class="l" href="#114">114: </a><span class="php-comment"> * @access  public
</span></span><span id="115" class="l"><a class="l" href="#115">115: </a><span class="php-comment"> * @param   string
</span></span><span id="116" class="l"><a class="l" href="#116">116: </a><span class="php-comment"> * @return  string
</span></span><span id="117" class="l"><a class="l" href="#117">117: </a><span class="php-comment"> */</span>
</span><span id="118" class="l"><a class="l" href="#118">118: </a><span class="php-keyword1">if</span> ( ! <span class="php-keyword2">function_exists</span>(<span class="php-quote">'encode_php_tags'</span>))
</span><span id="119" class="l"><a class="l" href="#119">119: </a>{
</span><span id="120" class="l"><a class="l" href="#120">120: </a>    <span class="php-keyword1">function</span> <a id="_encode_php_tags" href="#_encode_php_tags">encode_php_tags</a>(<span class="php-var">$str</span>)
</span><span id="121" class="l"><a class="l" href="#121">121: </a>    {
</span><span id="122" class="l"><a class="l" href="#122">122: </a>        <span class="php-keyword1">return</span> <span class="php-keyword2">str_replace</span>(<span class="php-keyword1">array</span>(<span class="php-quote">'&lt;?php'</span>, <span class="php-quote">'&lt;?PHP'</span>, <span class="php-quote">'&lt;?'</span>, <span class="php-quote">'?&gt;'</span>),  <span class="php-keyword1">array</span>(<span class="php-quote">'&amp;lt;?php'</span>, <span class="php-quote">'&amp;lt;?PHP'</span>, <span class="php-quote">'&amp;lt;?'</span>, <span class="php-quote">'?&amp;gt;'</span>), <span class="php-var">$str</span>);
</span><span id="123" class="l"><a class="l" href="#123">123: </a>    }
</span><span id="124" class="l"><a class="l" href="#124">124: </a>}
</span><span id="125" class="l"><a class="l" href="#125">125: </a>
</span><span id="126" class="l"><a class="l" href="#126">126: </a>
</span><span id="127" class="l"><a class="l" href="#127">127: </a><span class="php-comment">/* End of file security_helper.php */</span>
</span><span id="128" class="l"><a class="l" href="#128">128: </a></span><span class="php-comment">/* Location: ./system/helpers/security_helper.php */</span></code></pre>

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